5-Methylsulfonylaminospiro(benzo(b)furan-2(3H),1'-cyclopropane)-3-one 72492-44-5 Methanesulfonamide, N-(3-oxospiro(benzofuran-2(3H),1'-cyclopropan)-5-yl)- N-(3-Oxospiro(benzofuran-2(3H),1'-cyclopropan)-5-yl)methanesulfonamide